Machine for applying driving-bands on high-explosive shells



I E. LABITOTIERE.

MACHINE FOR APPLY ING DRIVING BANDS ON HIGH EXPLOSIVE SHELLS. APPLICATION FILED JUNE 11. 1919.

1,346,455. Patented July 13,1920.

7 5 SHEETS-SHEET I- Flg 1 a E. LABITOTIERE. MACHINE FOB APPLYING DRIVING BANDS 0N H|GH E-XPIOSIVE SHELLS.

APPLICATION FILED JUNE I], I919- 7 1,346,455, 1 I Patented July 13, 1920.

5 SHEEIS-SHEEI' 2.

Fig. 2

E. LABITOTIERE. MACHINE FOR APPLYING omvme BANDS 0N HIGH EXPLOSIVE SHELLS.

APPLICATION FILED JUNE H, 1919. 1,346,455.

3 5 SHEETS-SHEET 3.

Patented July 13, 1920.

A E. LABITOTIERE. MACHINE FOR APPLYING DRIVING BANDS 0N HIGH EXPLOSIVE SHELLS.

APPLICATION FILED JUNE 11, I919. 1,346,455. I

5 SHEETS-SHEET 4.

Fig.5 Fig.6.

Patented July 13,1920.

E. LA'BITOTIERE. MACHINE FOR APPLYING DRIVING BANDS 0N HIGH EXPLOSIVE SHELLS.

APPLICATION FILED JUNE 11, 1919- 1,346,455. Patent d uly 13, 1920.

1 5 SHEETS-SHEET 5' Fig. 7.

"UNITED STATES PATENT OFFICE.

EDOUARD LABITOTIERE, OF .BEZONS, FRANCE.

Specification of Letters Patent.

Patented J uly 13, 1920.

Application filed June 11, 1919. Serial No. 303,514.

To all whom it may concern.-

Be it known that I, EDOUARD LABITOTIilRE, of .2 Quai de Seine, Bezons, Seine, France, engineer, have invented Machines for Applying Driving Bands on High Explosive Shells, oi which the following is a clear, full, and exact description.

The invention relates to a machine for ap- .plying driving bands on high explosive shells, by the action of a falling mass.

This machine, the construction of which is such as to enable shells to be provided with a single or a double driving band, is essentially characterized by the combination of its component elements, viz:

a)--The falling mass, I

Z))-A hammer arranged under this mass and provided with a peen having a special shape,

c)--A cam adapted to effect the raising of the mass,

cZ)-A circular operating frame for the shell, controlled by a ratchet so as to effect, at each descent of the hammer, a peripheral advance equal to a predetermined fraction of a revolution,

c)A pawl brake adapted to hold the hammer stationary in its raised position when the machine is thrown out oi? gear,

7)A shell carriage allowing, in case the shell is to receive a second driving band, the displacing of the same to the desired extent for that purpose, when the first driving band has been placed in position.

The two main'characteristic features of the machine are as follows:

1. The special shape of the hammer peen. The peen has anoblique and rounded shape, with a radius displaced of about 10 rela tively to the axis of descent of the hammer. This shape insures the progressive settling of the small copper bar in the circular groove of the shell; it promotes the lengthening of this small copper bar which is subjected to a powerful drawing out action, so that in the operation of applying "driving bands to shells shorter bars may be used. wlnch allow of obtalnmg a serious economy of material. Finally, the special shape of the hammer peen insures a perfect adherence of the driving band.

2. The above mentioned pawl brake. This automatically operating brake acts upon the toothed wheel actuating the cam, so as to hold the hammer stationary in its highest position when the machine is thrown out of gear. It is thus possible to replace the shell which has been provided with a driving band by another, without having to effect a special operation for raising the hammer.

The machine is illustrated, by way of ex ample, in the accompanying drawings, in which:

Figure 1 is an elevation of the machine.

Fig. 2 is a front view of the same.

Fig. 3 is an elevation showing the machine on the opposite side from thatof Fig. 1.

Fig. i is a separate View showing the special shape of the hammer peen.

Figs. 5 and 6 are two diilerent views of the pawl brake which show clearly its mode of operation.

Fig. 7is a view of one side of the machine.

As illustrated in the drawings, the machine carried by a frame a, is operated through a belt and a fast pulley 'b. 0 is the fork adapted to bring the belt on the loose nilley (Z for the throwing out of gear of the machine. The movement is transmitted, re duced by a spur wheel gearing c and 7, to the-cam g secured on the shaft of the wheel .7. This cam is adapted to eiiect the raising of the falling mass it, by means of the roller 91 carried by this mass. The latter is provided, at its lower part, with a hammer j, the peen of'which, as illustrated more particularly in Fig. a, is of an oblique and rounded shape, with a radius displaced of about 10 relatively to the axis of descent of the hammer 7', in view of obtaining the above mentioned results; by the expression, with a radius displaced of about 10 relatively to the axis of descent of the hammer, is meant that the center of the rounded part of the peen is not located on the axis of the descent of the peen, but is displaced relatively to the axis, so that the general direc-' tion of the operative or active surface of the peen makes with the horizontal plane an angle of 10, as clearly shown in the drawings, having reference more particularly to Fig. 1, in which the 10 angle is indicated by thedotted line and the inscription 10.

On the frame a of the machine is mounted a carriage 70 which may be moved sidewise by means of a lever Z. The carriage 70 carries an operating frame m for the shell n to be provided with a driving band.

The putting intov place of the driving band of movement which brings the pawl 2 1n engagement witlrone of the teeth. of the is effected in such conditions thata blow of the hammer is struck for each length of" 1 (lI'lVlIlg band oi about 32 mill meters. lor

this purpose, the operating circular irame m receives, at each revolution of the machine, that is to say at each descent of hammer j, a rotary movement equal to a fraction of a revolution corresponding to the said length of driving band. This rotary movementis imparted to the. circular frame m by a ratchet wheel 0 having 120 teeth and receiving, ateach descent of the hammer y',an advance of one tooth, under the action ofa pawl j). V The latter is actuated by an incline .9 arranged within the spur wheel f, through the medium of a system of levers and links r, 8, t. A l I u is the guide for the small copperba'rs. This guide is constructed in such a manner as to allow of providing the'shells with a single or double drivingband. The position of theshell n in'the operatingcircular frame m, relatively-to the guide a, is determined by a rocking abutment 7) which is turned down and against which-the base of the shellis pressed; the screw whichholds the shell stationary in the circular frame 172 is then strongly tightened. i i

The shell is supported byfour rollers :20 arranged on eachside of the axis of descent of the hammer j and adapted to. bear the reactions due to the shock of the hammer.

For the shells which are to be. provided with a double driving band, the carriage 7c is, by means of the lever Z, moved sidewise to the necessary extent in such a manner that, when the first driving band-has been put into place, the axis .of the hammer j ispin the axis. ofthe second small copper bar brought in through the second opening of 1 the guide A handle nut Z is adapted to hold the carriage is stationary in its'two working positions; r

The pawl brake m (Figs. land 3) adapted to hold automatically thehammer in its raised. position, Whenthe machine. is

thrown-out of gear, is illustrated separately in Figs. 5 and 6. This brake comprises a member 3 capable of pivoting about the axis .2 and carrying a v pawl 2. On the other hand the brake comprises a leather band m whichis constantly and frictionally held, under the action of thespringizfl on one of the side faces of the teeth of the spur wheel f.I,The hammer j is so calculated thatthe throw should be suiiicient to always cause itto rise to the upper position, at the time the machine is thrown out of gear,

7 V whatever may be the position itoccupies' at the time of throwing out of gear. -However, as soon as it has. reachedgthe upper position, it falls down by gravity and, when falling down, it reverses the "direction of rotation of the wheel 7. It is this reversion wheel 7 which thus is held-stationary, so that the hammer is immobilized in its uppermost position. ,This locking action is produced in the following conditions:

During the rotation of the spur wheel f in the running direction of the machine, the friction of the leather band m on theteeth of'the wheel f has for effect to hold the member in the position illustrated in Fig. 6,-so that'the pawl 2 is located on the radius e v But', at'thev time ofthe reversion of the direction of rotation, determined by the fall ofthe hammer j, this friction causes the member y to'pivot about its axisz thus bringing the pawl e onthe radius.

2 -71 where it is-in'engagement with one of the te'ethofthe wheel 7. -As already explained, the hammer is-automatically retained in its upper position by the pawl brake when. the machine is thrown out of gear, for the purpose of replacing the shell, to which the driving band has been applied, by another shell, without therefore having to effect a special operation forraising-the hammer. In regard to the arrangement and mode of operation and iunction of the pawl brake, it may be added as has been already ,set forth that, when the machine isthrown out oi'gear, the throw of the hammer is sufficient for causing the latteralways to rise to the upper part, whatever may be the position it occupies at the time of throwing the machine out of gear. The hammer. then tends to descend again by itsoWn weight,

and this movement is transmitted by fric tion to the pawl brake which enters in action and stops the descent. The stoppage is not produced exactly at the top of the stroke of the hammer, but a little below.

The operation of'the machine is eiiected in the following manner 1-;

The shell a is placed on the supporting rollers 50, the head of the shell being turned toward the o ieratin circular frame m.

C7 The groove which is to receive the driving band is cleaned by means of a brush by causing the shell to turnon the rollers w The rocking abutments o for the base of the shell are turned down, the @shell is pressed against these abutments and the screw adapted toimmobilize the shell in the circular frame we istightlyscrewed on. The .end of the small. copperbar is then introduced in its guide a. Its end must 'extendbeyond the axis of thefhammer to the extent of about two centimeters in the direction of the rotation of'the shell, as indicatedbythe arrow (Figs. land 3).

The machine is then started "and efl ects memes its work in the conditions described and it till copper bar is at a distance of two centimeters from the axis of the hammer There remains between the ends of this copper bar a playot about two millimeters. lVhen the shell is to receive a second driving hand, the carriageir: carrying the shell is moved sidewise to an extent of about three centimeters, by means of the lever Z and it is held stationary by the handle nut Z in this second position, then the shell is rotated through 180 for laying the second driving band.

The application of the driving band is terminated by hand by means of a hammer 0t 1 kg. 500.

It is to be understood that any modifications considered useful or advantageous may be made in the construction of the machine described and illustrated, and this without departing from the principle of the present invention.

Claims.

1. A machine for applying driving bands on high explosive shells, comprising a falling mass, a hammer placed under this mass and having a peen of special shape, means for ctl ecting the raising of said mass, means for imparting to the shell, at each descent oi the hammer, a rotary movement through a predetermined traction of a revolution, means tor maintaining the hammer in its uppermost position when the machine is thrown out oil gear, and means, in case the shell is to receive a second driving band, to move said shell to the desired extent for that purpose, after the application of the first driving band.

2. A machine for applying driving bands on high explosive shells, comprising a talling mass, a hammer placed under this mass and having an oblique and rounded shape with a 'adius displaced of about 10 relatively to the axis of descent of the hammer to obtain a progressive settling of the driving band in the circular groove of the shell.

3. A machine for applying driving bands on high explosive shells, comprising a talling mass, a hammer placed under this mass and having an oblique and rounded shape with a radius displaced of about 10 relatively to the axis of descent of the hammer to obtain a progressive settling ot' the driving band in the circular groove of the shell, and a cam adapted to eiiect the raising of the mass.

4,. A machine for applying driving bands on high explosive shells, comprising a talling mass, a hammer placed under this mass and having an oblique and rounded shape with a radius displaced of about 10 relatively to the axis of descent of the hammer to obtain a progressive settling of the drivingband in the circular groove 0' s a cam adapted to effect the rai mass, and a pawl brake compris ber capable of p voting a jiout an axis and carrying a pawl as well leather band constantly rubbing against the s de face or the spur wheel actua the r g cam, this device allowing the pawl, whenthe machine is thrown out oi? gear, to cor e in engagement with the spur wheel and. to hold it stationary so that the hammer is held in its uppermost position.

5, 41 machine for applying driving bands on high explosive shells, comprising a talling mass, a hammer placed under this mass and having an oblique and rounded shape with a radius displaced of about 10 relatively to the axis of descent oi? the hammer to obtain a progressive settling oi the driving band in the circular groove, a cam adapted to effect the raising of the mass, a pawl brake comprising a member capable of pivoting about an axis and carrying a pawl as well as a leather band constantly rubbing against the side face oi": the spur wheel actuating the raising cam, this device allowing the pawl, when the machine is thrown out of gear, to come in engagement with the spur wheel and to hold it stationary so that the hammer is held in its uppermost position, an operating circular frame receiving at each descent of the hammer a rotary move ment through a predetermined fraction of a revolution, and a device for actuating this circular trams and comprising a ratchet wheel driven, under the action of a pawl, by an incline arranged within the spur wheel and acting through the medium of levers and links.

(5. A machine for applying driving bands on high explosive shells, comprising a falling mass, a hammer placed under this mass and having an oblique and rounded shape with a radius displaced of about 10 relatively to the axis of descent oi the hammer to obtain a progressive settling of the driving band in the circular groove ot the shell, a cam adapted to effect the raising of the mass, a pawl brake comprising a member capable of pivoting about an axis and carrying a pawl as well as a leather band constantly rubbing against the side face of the spur wheel device allowing'the pawl, when the machine is thrown out of gear, to come in engagement with the spur wheel and to hold it stationary so that the hammer is held in its uppermost position, an operating circular frame receiving at each descent of the hammer a rotary movement through a predetermined fraction of a revolution, a device for actuating this circular frame and comprising a ratchet wheel driven, under the action of a pawl, by an incline arranged within actuating the raising cam, this the spur Wheel and acting through the medinln of levers and links, and carriage carrying the said circular frame and capable of receiving, by means of a lever, a lateral displacement which allows, When the shell is to receive a second driving band, the

bringingof it in aposition Where the axis of the hammer intersects the axis of the sec- 0nd small copper bar brought in through the second opening of the guide forthe cop per bars. I V Y I The foregoing specification of niy rnachine for, applying driving hands'on high explosive shells, signed by me this nineteenth day ofMay, 1919. Y

1 e EDOUARD LABITOTIERE. 

